[Elecraft] [K3] Re： Re： K3 VS 7600 Sherwood List

[Val]

> This is the key to your perception of the K3 and the other rigs.  If 
> you're
> operating 3 kHz from any strong SSB station, the observed dynamic range
> (probably ~35 dB) is primarily limited by the cleanliness of his 
> transmitted
> signal (TX IMD, phase noise, etc) no matter how good your receiver may be.
> In fact Sherwood's ranking (2 kHz IMD performance) only makes sense for 
> CW,
> since it simulates performance of a CW receiver with strong stations 
> spaced
> every 2 kHz.  If you don't operate CW, then indeed there's probably little
> difference in any receivers since none of them can clean up transmitted 
> SSB
> QRM.
>
> If you operate CW in crowded contests or large pileups, there's a vast
> performance difference (20-30 dB in dynamic range) in the rigs you have.
>
> 73,  Bill
>

Actually, the situation in CW is not much different.  The side emissions of 
the best transmitters on the ham bands are only 90 dB below the signal. 
That's why the real world experiences aren't  such as expected from the lab 
measurements figures.

73, Val LZ1VB